Reject compressed sections exceding 4 GiB on LLP64 machines

According to the zlib FAQ (*1), zlib does not support compressed data
larger than 4 GiB when the compiler's long type is 32 bits. Therefore,
we need to report an error if a zlib-compressed debug section exceeds
4 GiB on LLP64 machines.

(*1) https://zlib.net/zlib_faq.html#faq32

Signed-off-by: Rui Ueyama <rui314@gmail.com>